I'm trying to design an apparatus for steam cooking thick patties/cakes made of ground grain/bean/veg. I would like it to be energy efficient/insulated, and recycle the water so it doesn't need much water and will not boil dry. I want the cakes to rest on bamboo surfaces that hold several cakes and can be stacked. So maybe an apparatus that has some functional design elements of a still? Does anything like this already exist?